Rotary pump



May 25, 1943. c. VvCOPELAND ETAL 2,319,776

' ROTARY'PUMP Filed Nov. 8; 1940 2 Sheets-Sheet 1 ZZb INVENTORS Frederick S. Schrage Charles Vopeland, BY W 9 m fay ATTORNEYS May 25, 1943. c. v. COPELAND ETAL 2,319,776

ROTARY PUMP Filed Nov. 8, 1940 v 2 Sheets-Sheet 2 '7-= INVENTORS v .Frederipk-.S.Schra. e Chg/14 251 Copeland, BY m 7%;

ATTORNEYS Patented May 25, 1943 2,319,776 aorAnY PUMP Charles V. Copeland, Davenport, Iowa, and Frederick S. Sclu'age, Rock Island, 111., assignors, by mesne assignments, to Joshua Hendy Iron Works, Sunnyville, Caliifi, a

Nevada corporation of Application November 8, 1940, Serial No. 364,!i

(ill. 103-96) 8 Claims;

This invention relates to rotary pumps, and

more particularly to pumps comprising a rotor having liquid impelling means, such as a plural ity of marginal buckets operating in an annular pressure building passageway.

It is an object of the present invention to provide a, pump which can be operated eiliciently in either direction of rotation of the rotor.

It; is another object of the present invention to provide a rotary pump which is relatively simple and easy to manufacture, and which is equally efilcient when operated to pump in either direction.

It is a further object of the present invention to provide a pump wherein casing sections, including the inlet and outlet portions, are substantially identical and interchangeable.

Other objectswill be apparent from-the following description of the invention, as illustrated in the accompanying drawings, in which:

Figure 1 is an elevational view, partly in section, of a pump embodying the present invention;

Fig. 2 is a sectional view, with parts removed, taken on the line 2-2 of Fig. 1;

Fig. 3 is an elevational view of a portion of the rotorshowing a desirable construction;

Fig. '4 is a plan view of one of the two identical casing members; and

Fig. 5 is an elevational view of one of the casing members showing the integral construction.

Referring more particularly to the drawings, wherein like parts are designated throughout the several views by like letters and numerals of reference, a pump casing has two substantially identical casing sections I. Each casing section comprises a suitable supporting-base portion 2, and a substantially cylindrical body portion. The body of each casing section is provided around its periphery with a rim 5 having a face 6 for cooperation with the corresponding face of the mating casing section, whereby a seal between the casing rims may be eiiected. Adjacent the rim of the casing section is an internal, annular channel I, which registers with a corresponding annular channel in the other casing section and cooperates to form the pressure developing passageway of the pump.

Two casing sections, designated in and lb in Y Figs. 1 and 2, may be secured together in fluidallel to the axis or the shaft and bisecting the base 2, so that the apertures of eachcasing section will register with similar holes in the cooperating casing section when they are brought face to face. To facilitate machining of the rims, suitable recesses 9 may beformed in the faces 6 of the casing members. When the casing sections are thus secured together with the channels iin register, they form a pressure building passageway, the outer wall of which is formed by inner .walls iii of the rim portions 5 of the casing members.

Similarly, the inner portions of the channel 1 are formed by the shoulders or the central portions ii concentric with the inner faces iii of the rims. The central portions i i are disposed suihciently close to a rotor I! to substantially restrict the flow of fluid radially inward from the fluid passageway formed by the channels '5.

The casing sections la and lb may be provided with shaft supporting brackets or bossesii, which are preferably internally threaded and substantially concentric with the annular pressure deiii having a hub IS, an intermediate web portion and an outer peripheral portion carrying impeller ribs or vanes 20. The disc l'i, near the base of the ribs 20, has a close working fit between the central portions ll of the casing sections i, whereby liquid in the annular passage is substantially prevented from flowing radially inward toward the central portion of the casing. The

ribs 20 are preferably formed at both sides of the peripheral edge .of the rotor and form suitable buckets which engage the liquid in the liquid passage. the side walls of the liquid passageway and the peripheral edges of the buckets may be spaced from the circumferential wall of the passage 1.

Each casing section is provided with a port boss 4, and, as shown in Figs. 1 and 2, where two casing sections are assembled these bosses are designated as to and 4b. The bosses la and 4b form the inlet and outlet ports 22:: and 22b, which are preferably internally threaded to receive suitablepipe connections (not shown) to bring the fluid to and take it away from the pump. Whether the port 22a be the inlet or outlet of The edges of .the buckets are spaced from the pump is dependent upon the direction of rotation of the pump rotor. In Fig. 5, showing one of the casing sections, a port 22 is indicated in dotted lines at the upper right-handportion, and this port communicates with one end of the liquid passageway I.

When two casing sections are secured together, as shown in Figs. 1 and 2, the ports 22a and 22b are disposed angularly relative to each other, each port being opposite the end of the passageway i in the other casing section. Between the ports 22a and 2217 the casing sections are shaped to provide a stop 25 to prevent the fluid being pumped from passing directly from the outlet end of the passageway 'l to the inlet end thereof. To provide the stop, each pump casing section has a shoulder 26 extending radially inwardly from the rim, and this portion 26 closely overlies the peripheral'edge of the rotor. Also, each casing section is provided with a stop portion 2| extending closely adjacent the sides of the rotor in the region of the stop so that liquid being pumped will be deflected from the liquid passageway directly from the outlet of the pump.

Adjacent one end of the passageway I in each of the casing members is a depressed portion. In the casing member la the depressed portionua Similarly, when the rotor is operated in a counterclockwise direction the outlet is 221) and the inlet is 22a. Thus, with the above construction;

the pump will have the same performance characteristics, regardless of the direction in which the rotor is caused to rotate. I

It will be seen from Fig. 5 that the stop portion of the pump section and the major portion of the pressure developing passage are symmetrically disposed with respect to a plane bisecting the stop and passing through the axis of the casing. The ends of the pressure developing passage in a single casing section are different in that one end opens toa port and the other does not. If the casing section be made with an integral base, the base is also bisected by and symmetrically disposed with respect to the above mentioned plane.

When the two pump casing sections are disposed (Fig. 2) is opposite the port 22b of the other casing section, and in the casing section lb the depressed portion 24b is opposite the port 22a of the first mentioned casing section. These depressed portions facilitate ingress of the water to both sides of the rapidly moving rotor on one side of the stop and egress of the water from both sides of the rotor on the other side of the stop, theregistering stops of each section cooperating to.

prevent leakage of water therebetween. It will thus be seen that in each casing member one end of the channel I terminates in a port 22, the other end terminates in a large depressed portion to cooperate with the port of another casing section.

Leakage of fluid from the central portion of the casing through the shaft openings is prevented by suitable packing glands, such as seals 28., Each seal comprises a rotatable deformable member 29 of rubberlike material and a rotatable sealing member 3&3, which may be a metal or a self-lubricating metallic material, and which is pressed against the surface of a stationary metal sealing member 3! by a spring 32. A stationary deformable ring 33 of rubberlike material is disposed between the stationary sealing member and a shoulder 34 and is adapted to be forced against the surface of the sealing shoulder 21 by the spring 32 so as to effect a fluid seal between the v stationary, wear-resistant member ill and the shoulder 34. The rotatable deformable member 29 eifects a seal between the shaft and the rotatable member 30. A centrifugal deflector 36, which is provided on the rotor shaft between the pump and the bearing to deflect and throw oil by centrifugal force any liquid that may collect on the rotor shaft, thereby prevents such liquid from entering the bearings.

'Thepump may be driven by any prime mover. such as an electric motor coupled to the shaft l6. When the pump is in operation with the rotor turning clockwise (from the shaft coupled end) 2222 is the inlet and 22a is the outlet. The movement of the rotor with the buckets in its marginal portion through the passageway 1 causes the liquid to move from the inlet 22b through the pressure developing passage and be discharged through the outlet 22a at relatively high pressure.

ports are equidistant from the axial plane bisecting the stop. It is also apparent from the drawing that the v major portion of the pressure developing passage, as well as of the pump casing,

is symmetrically disposed about an axial plane tions of the construction shown may be resorted I to without departing from the spirit of this invention, as defined in the appended claims.

What we claim is: l. A pump casing for a pressure developing pump of the type having ai rotor with a central disc portion and with a plurality of marginal buckets to develop fluid pressure in an annular pressure developing passageway, comprising two substantially identical mating casing sections, each section having an integral base portion, an integral shaft supporting boss and a substantially cylindrical body portion, said body portion having a central portion for close working flt with said disc portion of said rotor to prevent liquid from flowing inwardly toward the central portion of said casing section and a rim which has a face for cooperation with the face of the mating sections, an annular channel in each section adjacent said rim, the channels in the two sections registering and forming together an annular pressure developing fluid passageway, the terminals of said fluid passageway being ports for ingress or egress of fluid, a stop between said ports for deflecting fluid from said passageway into the outlet port, said stop comprising a shoulder portion in each section adapted to closely overlie the outer periphery of said rotor and extending to theplane of the face of said rim, said ports and portions of said passageway being substantially equidistant from an axial plane bisecting said stop and said base portion, portions of said passageway and said stop being symmetrical with respect to said plane, whereby a. pump is provided in which the rotor may. be caused to rotate in either direction without varying the characteristics of the pump.

2. A pump casing for a pressure developing pump of the type having a rotor with a central disc portion and with a plurality of marginal buckets to develop fluid pressurein an annular pressure developing passageway, comprising two ,substantially identical mating casing sections, 1 each section having a substantially cylindrical bod portion, said body portion having a central portion for close working flt with said disc portion of said rotor to prevent liquid from flowing fluid passageway being ports for ingress or egress of fluid, a stop between said ports for deflecting fluid from said passageway into the outlet port,

said stop comprising shoulder portions adapted to closely overlie the outer periphery of said rotor and extending .to the plane of the face of said rim, said ports andportions of said passageway being substantially equidistant from an axial plane bisectingsaid stop, portions of said passageway and said stop being symmetrical with respect to said plane, whereby a pump is provided in which the rotor may be caused to rotate in either direction without varying the characteristics of the pump. 1

3. A pump casing for. a pressure developin pump of the type having a rotor with a central disc portion and with a plurality of marginal buckets to develop fluid pressure in an annular pressure developing passageway, comprising two substantially identical mating casing sections, each section having an integral base portion, an integral shaft supporting boss concentric with said pressure developing passageway and'a substantially cylindrical body portion, said body portion having,a central portion for close working flt with said disc portion of said rotor to prevent liquid from flowing inwardly toward the central portion of said casing section and,a rim which has a face for cooperation with the face of the mating sections, an annular channel in each section adjacent said rim, the channels in the two sections'registering and forming together an annular pressure developing fluid passageway, the terminals of said fluid passageway being ports for ingress or egress of fluid, a stop between said ports for deflecting fluid from said passageway into the outlet port, said ports and portions of said passageway being substantially equidistant from an axial plane bisecting said stop and said base portion, portions of said pressure developing passageway intermediate its ends and portions of said stop being symmetrical with respect to said plane, whereby a pump is provided in which the rotor may be caused to rotate in either direction without varying the characteristics of the pump.

4. A pump casing for a pressure developing pump of the type having a rotor with a central disc portion and with a plurality of marginal buckets to develop fluid pressure in an annular pressure developing passageway, comprising two substantially identical mating casing sections, each section having a substantially cylindrical body portion andanintegral base, said body portion having a central portion for close workingfltwithsaiddiscportlonofsa idrotortoprevent liquid from flowing inwardly towardthecentral portionofsaidcasingsectionandarimwhich' has a face for cooperation with the face of the matingsections,anannularchannelineachsecsections registering and forming together an annular pressure developing fluid passageway, the terminals of saidfluid passageway being ports for ingress or egress of fluid, a stop comprising a shoulder portion in each casing section between said ports for deflecting fluid from said passageway into the outlet port, said ports and portions of said passageway being substantially equidistant from an axial plane bisecting said stop, portions of said passageway intermediate its ends and portions of said stop being symmetrical with respect to said plane, whereby a pump is provided in which the rotor may be caused to rotate in either direction without varying the characteristics of thepump.

5. A pump casing for a pressure developing pump of the type having a rotor with a central disc portion and with a plurality of marginal buckets to develop fluid pressure in an annular pressure developing passageway, comprising two substantially identical mating sections, each mating section having a base portion, a, hub portion to receive a rotor shaft and a fluid seal, and a body portion to receive a rotor disc, said body portion having a central portion for close working fit with'said disc portion of said rotor to pre' vent liquid from flowing inwardly toward the central portion of said casing section and a rim between the terminals of said passageway, said stop havinga shoulder which closely overlies the periphery of said rotor disc and a portion closely adjacent the sides or said disc, said ports being equidistant from a vertical, axial plane substantial y symmetrically dividing said base and saidstop, portions of said pressure developing pa's-.

sageway intermediate itsends and portions of said stop being symmetrical with respect to said plane.

6. A single stage pump having a rotor with a central disc portion and with a plurality of marginal buckets to develop fluid pressure in an annular'pressure developing passageway, two substantially-identical mating casing sections, each casing section having a portion in close working fit with a side of the rotor radially inwardly of said passageway to prevent flow of liquid ridially I edge of the rotor disposed between the terminals inwardly toward the central portion of the pump,

each section having a substantially cylindrical body portion and an integral shaft supporting boss, said-boss being internally threaded and carrying bearings adjustable longitudinally of said boss to center said rotor with respect to said sections, said cylindrical body portion having acentral portion and a rim with a face for cooperation with the corresponding face of the mating section, an annular channel adjacent the rim, said channel terminating at one end in a port and at the other'end in a' depressed portion.

a shoulder for closely overlying the peripheral I of said channel, said shoulder terminating sub- 'stantially at the plane of the face of said rim,

7 portions of said shoulder and said channel intermediate its ends being. substantially symmetrical- 1y arranged about an axial'plane bisecting said shoulder, whereby a pump is provided in which tion adjacent said in the two is the rotor may be caused to rotate in either dim.

tion without varying the characteristics of the pump. I

7. A single stage pump having a rotor with a central disc portion and with a plurality of marginal buckets to develop fluid pressure in an annular pressure developing passageway, two substantially identical mating casing sections, each casing section having a portion in close working fit with a side of the rotor radially inwardly of said passageway to prevent flow of liquid radially inwardly toward the central portion of the pump. each section. having a substantially cylindrical body portion and an integral shaft supporting boss carrying adjustable bearings to center said rotor in said casing, said body portions having a central portion and a rim with a face for cooperation with the corresponding face of the mating section, an annular channel adjacent the rim, said channel terminating at one end in a port and at the other end in a depressed portion, a shoulder for closely overlying the peripheral edge of the rotor disposed between the terminals of said channel, said shoulder terminating substantially at the plane of theiace of said rim, said channel intermediate its ends being substantially symmetrically arranged about an axial plane bisecting said shoulder, whereby a pump is provided in which the rotor may be caused to rotate in either direction without varying the char ing, a pressure developing passage in said casing, a rotor having buckets to engage liquid in said passage, said casing comprising a pair oil-.5111;- stantially identical casing sections cooperatively providing said liquid pressure developing passage, an inlet and an outlet communicating with the ends of said passage, a liquid deflecting stop having a portion which closely overlies the peripheral edges or the rotor and a portion which closely overlies the sides of said rotor in the vicinity of the marginal buckets, said stop being between the inlet and outlet to direct fluid into the outlet, portions of said pressure developing passage and portions of said stop on each side of a medial plane through saidstop and through the axis of the pump being substantially identical, said pressure developing passage at the lateral edges of said buckets being of substantially greater width than thewidth of the opening in said stop, said inlet and said outlet being substantially equidistant from said plane whereby a pump is provided in which the rotor may be caused to rotate in either direction without changing the characteristics of the pump, said rotor having a solid annular portion in working fit within said casing radially inwardly of said pressure developing pas- CHARLES v. COPELAND. FREDERICK s. 'SCHRAGE. 

